From Alex Martin@21:1/5 to All on Tue Jul 12 21:07:41 2016
I have two cats that I live with (one is mine, the other my roommate's,
though they are siblings). When I scratch on either one's spine, they
seem to feel a desperate need to lick something, including the air, my
hand, themselves, or a random nearby object.
Does anyone know why they do this and if there's any evolutionary
reason for it?